public class cs4 {
    public static void main(String[] args) {
        int [] a = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15} ;
        int b = a.length;
        System.out.println(b);
        for (int c = 1; c <=15 ; c++) {
            System.out.println(c);
        }
    }
}
